709
Table Data Processing Instructions Section 3-17
Examples When CIO 000000 is ON in the following example, PUSH(632) copies the
content of D00200 to the stack beginning at D00000. In this case, the stack
pointer indicates D00007.
3-17-3 FIRST IN FIRST OUT: FIFO(633)
Purpose Reads the first word of data written to the specified stack (the oldest data in
the stack).
Ladder Symbol
Variations
Applicable Program Areas
PC memory address
Write A.
Last word
in stack
Stack
pointer
PC memory address
of last word in stack
Stack pointer
A
PC memory address
After the data is written to
D00007, the stack pointer
is incremented by one.
PC memory address
of last word in stack
Stack pointer
Last word
in stack
FIFO(633)
TB
D
TB: First stack address
D: Destination word
Variations Executed Each Cycle for ON Condition FIFO(633)
Executed Once for Upward Differentiation @FIFO(633)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
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